What to do if the difavtomat at the input is turned off?
Good afternoon! A very long time during the repair, the introductory difavtomat 63A 100 mA was cut down. Well, and stopped turning on! What I did not remember, something with walls and maybe in the area of outlets! I thought that the difavtomat died, well, and connected it directly from the counter. For a long time everything worked. Today I decided to change the difavtomat, but still with the new one, it does not turn on! He began his teapot research and determined that the difavtomat would turn on if either zero or ground was disconnected on a panel on room sockets on one panel! As a result, disconnected the earth and everything works!
I think that somewhere shorty! Of course I will not break the walls, half of the country lives without land and nothing! But I would like to ask if something can be done? Find shorty say, disconnecting the branch on the shield and then measuring the resistance between outlets? And if of course you can’t fix the shorty in the wall, then what can be done for safety, can put an additional RCD on this branch or a difavtomat! In general, can you advise something? Thanks in advance! Sergey, the teapot.
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If the 100mA difavtomat turns off, then there is a current leakage of more than 100 mA. This current when exposed to humans can be fatal. It is unsafe to operate such wiring. It is necessary to find the damaged area and eliminate the malfunction. Most likely, the cable was damaged during the repair process. On which line of the wiring the problem is - can only be determined by turning off the lines one by one. That is, disconnect one line - make a trial turn on of the difavtomat, if it turns off - turn off the next line, etc.
It makes no sense to put an additional RCD or a difavtomat on a damaged line - it will also be turned off. In general, for outgoing lines, for the safety of RCDs, one needs to choose a lower threshold of operation - 10-30 mA, but what is the point of putting them if the leakage current is more than 100 mA.